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A pesticide is or may be a chemical substance or biological agent used against pests including insects, plant pathogens, weeds, mollusks, birds, mammals, fish, nematodes and microbes that compete with humans for food, destroy property, spread diseases, and are a real nuisance. Pesticides were first created either during or before 500 B.C.. The first known pesticide was sulfur. By the 15th century toxic chemicals such as arsenic, Mercury, and lead were used on crops to kill pests. By the 17th century nicotine sulfate was extracted from tobacco leaves to be used as insecticides (a form of pesticide). In the 19th century two more natural pesticides, pyrethrum which is derived from chrysanthemums, and rotenone which is derived from the roots of tropical vegetables. Pesticides have a very big effect on the environment. They pollute the air, lakes, rivers, and streams in the United States. And yes it can destroy crops.
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What are some of the dangers to crops?
Drought, insects, famine, to much pesticide, to little pesticide are possible problems.
Are there harmful effects of genetically altered crops and animals?
lower pesticide
Why is pesticide not always beneficial?
it destroy both useful and harmful organisms
Why can flood waters destroy crops and houses?
it can destroy houses and crops. Because the water erodes the ground
Genetically-modified organisms (GMOs) have included corn crops engineered to produce a natural pesticide to kill a certain insect which would normally destroy the corn. The benefits include a larger c?
A larger crop yield.
What all destroys crops?
Instects often destroy crops.
If you do not separate earthworms then do they destroy the crops?
Worms are good for crops.
What are large numbers of insects or animals that destroy crops called?
Swarm of locust can be one that can destroy whole fields of crops.
Can bacteria destroy crops?
Yes
What do locust do to destroy crops?
They eat them.
What is a bad effect of spraying chemical pesticide on crops?
Runoff, secondary poisoning of non targets.
Is ddt a medicine?
No. DDT was a pesticide used to kill insects on crops. It has been banned because it caused tremendous problems for humans who ate the crops.
